The green wire running from your O2 sensor to the ECU is coxial.  The coax is
supposed to shield the signal from interference.  The problem arises when the
insulation between the coax and signal wire breaks down over time.  This
shows up as an off idle stumble when the engine is warm.  If the only problem
you're having is the increased idle speed, your problem is most likely not
the O2 sensor wire.

Have you checked the basics like timing and throttle position switch
adjustment?

Chuck
'85 Wolfsburg Westy -- 'Roland the Road Buffalo'

In a message dated 4/17/01 7:50:55 PM, jboldway@COTTAGESOFT.COM writes:

<< Hello!
(wrote this about 3 weeks ago but frogot to send)
Just read some comments on O2 sensor wire being coaxial and thought that
would solve my problem - but my 02 sensor isn't coax - just terminates with
spade plug. Anyway, It used to idle around 800 rpm which was just fine but
for the last few months it seems to idle at about 1700 rpm. Checked cable
and such - can't find problem. Any ideas? >>